2 * File elf.c - processing of ELF files
4 * Copyright (C) 1996, Eric Youngdale.
5 * 1999-2007 Eric Pouech
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
23 #include "wine/port.h"
25 #if defined(__svr4__) || defined(__sun)
27 /* large files are not supported by libelf */
28 #undef _FILE_OFFSET_BITS
29 #define _FILE_OFFSET_BITS 32
35 #ifdef HAVE_SYS_STAT_H
36 # include <sys/stat.h>
39 #ifdef HAVE_SYS_MMAN_H
46 #include "dbghelp_private.h"
48 #include "image_private.h"
50 #include "wine/library.h"
51 #include "wine/debug.h"
55 #define ELF_INFO_DEBUG_HEADER 0x0001
56 #define ELF_INFO_MODULE 0x0002
57 #define ELF_INFO_NAME 0x0004
59 #ifndef NT_GNU_BUILD_ID
60 #define NT_GNU_BUILD_ID 3
63 WINE_DEFAULT_DEBUG_CHANNEL(dbghelp
);
67 unsigned flags
; /* IN one (or several) of the ELF_INFO constants */
68 DWORD_PTR dbg_hdr_addr
; /* OUT address of debug header (if ELF_INFO_DEBUG_HEADER is set) */
69 struct module
* module
; /* OUT loaded module (if ELF_INFO_MODULE is set) */
70 const WCHAR
* module_name
; /* OUT found module name (if ELF_INFO_NAME is set) */
75 struct hash_table_elt ht_elt
;
77 struct symt_compiland
* compiland
;
84 THUNK_ORDINAL ordinal
;
85 unsigned long rva_start
;
86 unsigned long rva_end
;
89 struct elf_module_info
91 unsigned long elf_addr
;
92 unsigned short elf_mark
: 1,
94 struct image_file_map file_map
;
97 /******************************************************************
100 * Maps a single section into memory from an ELF file
102 const char* elf_map_section(struct image_section_map
* ism
)
104 struct elf_file_map
* fmap
= &ism
->fmap
->u
.elf
;
105 size_t ofst
, size
, pgsz
= sysconf( _SC_PAGESIZE
);
107 assert(ism
->fmap
->modtype
== DMT_ELF
);
108 if (ism
->sidx
< 0 || ism
->sidx
>= ism
->fmap
->u
.elf
.elfhdr
.e_shnum
||
109 fmap
->sect
[ism
->sidx
].shdr
.sh_type
== SHT_NOBITS
)
112 if (fmap
->target_copy
)
114 return fmap
->target_copy
+ fmap
->sect
[ism
->sidx
].shdr
.sh_offset
;
116 /* align required information on page size (we assume pagesize is a power of 2) */
117 ofst
= fmap
->sect
[ism
->sidx
].shdr
.sh_offset
& ~(pgsz
- 1);
118 size
= ((fmap
->sect
[ism
->sidx
].shdr
.sh_offset
+
119 fmap
->sect
[ism
->sidx
].shdr
.sh_size
+ pgsz
- 1) & ~(pgsz
- 1)) - ofst
;
120 fmap
->sect
[ism
->sidx
].mapped
= mmap(NULL
, size
, PROT_READ
, MAP_PRIVATE
,
122 if (fmap
->sect
[ism
->sidx
].mapped
== IMAGE_NO_MAP
) return IMAGE_NO_MAP
;
123 return fmap
->sect
[ism
->sidx
].mapped
+ (fmap
->sect
[ism
->sidx
].shdr
.sh_offset
& (pgsz
- 1));
126 /******************************************************************
129 * Finds a section by name (and type) into memory from an ELF file
130 * or its alternate if any
132 BOOL
elf_find_section(struct image_file_map
* _fmap
, const char* name
,
133 unsigned sht
, struct image_section_map
* ism
)
135 struct elf_file_map
* fmap
;
140 fmap
= &_fmap
->u
.elf
;
141 if (fmap
->shstrtab
== IMAGE_NO_MAP
)
143 struct image_section_map hdr_ism
= {_fmap
, fmap
->elfhdr
.e_shstrndx
};
144 if ((fmap
->shstrtab
= elf_map_section(&hdr_ism
)) == IMAGE_NO_MAP
) break;
146 for (i
= 0; i
< fmap
->elfhdr
.e_shnum
; i
++)
148 if (strcmp(fmap
->shstrtab
+ fmap
->sect
[i
].shdr
.sh_name
, name
) == 0 &&
149 (sht
== SHT_NULL
|| sht
== fmap
->sect
[i
].shdr
.sh_type
))
156 _fmap
= fmap
->alternate
;
163 /******************************************************************
166 * Unmaps a single section from memory
168 void elf_unmap_section(struct image_section_map
* ism
)
170 struct elf_file_map
* fmap
= &ism
->fmap
->u
.elf
;
172 if (ism
->sidx
>= 0 && ism
->sidx
< fmap
->elfhdr
.e_shnum
&& !fmap
->target_copy
&&
173 fmap
->sect
[ism
->sidx
].mapped
!= IMAGE_NO_MAP
)
175 size_t pgsz
= sysconf( _SC_PAGESIZE
);
176 size_t ofst
= fmap
->sect
[ism
->sidx
].shdr
.sh_offset
& ~(pgsz
- 1);
177 size_t size
= ((fmap
->sect
[ism
->sidx
].shdr
.sh_offset
+
178 fmap
->sect
[ism
->sidx
].shdr
.sh_size
+ pgsz
- 1) & ~(pgsz
- 1)) - ofst
;
179 if (munmap((char*)fmap
->sect
[ism
->sidx
].mapped
, size
) < 0)
180 WARN("Couldn't unmap the section\n");
181 fmap
->sect
[ism
->sidx
].mapped
= IMAGE_NO_MAP
;
185 static void elf_end_find(struct image_file_map
* fmap
)
187 struct image_section_map ism
;
192 ism
.sidx
= fmap
->u
.elf
.elfhdr
.e_shstrndx
;
193 elf_unmap_section(&ism
);
194 fmap
->u
.elf
.shstrtab
= IMAGE_NO_MAP
;
195 fmap
= fmap
->u
.elf
.alternate
;
199 /******************************************************************
202 * Get the RVA of an ELF section
204 DWORD_PTR
elf_get_map_rva(const struct image_section_map
* ism
)
206 if (ism
->sidx
< 0 || ism
->sidx
>= ism
->fmap
->u
.elf
.elfhdr
.e_shnum
)
208 return ism
->fmap
->u
.elf
.sect
[ism
->sidx
].shdr
.sh_addr
- ism
->fmap
->u
.elf
.elf_start
;
211 /******************************************************************
214 * Get the size of an ELF section
216 unsigned elf_get_map_size(const struct image_section_map
* ism
)
218 if (ism
->sidx
< 0 || ism
->sidx
>= ism
->fmap
->u
.elf
.elfhdr
.e_shnum
)
220 return ism
->fmap
->u
.elf
.sect
[ism
->sidx
].shdr
.sh_size
;
223 static inline void elf_reset_file_map(struct image_file_map
* fmap
)
226 fmap
->u
.elf
.shstrtab
= IMAGE_NO_MAP
;
227 fmap
->u
.elf
.alternate
= NULL
;
228 fmap
->u
.elf
.target_copy
= NULL
;
231 struct elf_map_file_data
233 enum {from_file
, from_process
} kind
;
238 const WCHAR
* filename
;
248 static BOOL
elf_map_file_read(struct image_file_map
* fmap
, struct elf_map_file_data
* emfd
,
249 void* buf
, size_t len
, off_t off
)
256 return pread(fmap
->u
.elf
.fd
, buf
, len
, off
) == len
;
258 return ReadProcessMemory(emfd
->u
.process
.handle
,
259 (void*)((unsigned long)emfd
->u
.process
.load_addr
+ (unsigned long)off
),
260 buf
, len
, &dw
) && dw
== len
;
267 /******************************************************************
270 * Maps an ELF file into memory (and checks it's a real ELF file)
272 static BOOL
elf_map_file(struct elf_map_file_data
* emfd
, struct image_file_map
* fmap
)
274 static const BYTE elf_signature
[4] = { ELFMAG0
, ELFMAG1
, ELFMAG2
, ELFMAG3
};
278 size_t tmp
, page_mask
= sysconf( _SC_PAGESIZE
) - 1;
286 len
= WideCharToMultiByte(CP_UNIXCP
, 0, emfd
->u
.file
.filename
, -1, NULL
, 0, NULL
, NULL
);
287 if (!(filename
= HeapAlloc(GetProcessHeap(), 0, len
))) return FALSE
;
288 WideCharToMultiByte(CP_UNIXCP
, 0, emfd
->u
.file
.filename
, -1, filename
, len
, NULL
, NULL
);
297 elf_reset_file_map(fmap
);
299 fmap
->modtype
= DMT_ELF
;
301 fmap
->u
.elf
.target_copy
= NULL
;
306 /* check that the file exists, and that the module hasn't been loaded yet */
307 if (stat(filename
, &statbuf
) == -1 || S_ISDIR(statbuf
.st_mode
)) goto done
;
309 /* Now open the file, so that we can mmap() it. */
310 if ((fmap
->u
.elf
.fd
= open(filename
, O_RDONLY
)) == -1) goto done
;
315 if (!elf_map_file_read(fmap
, emfd
, &fmap
->u
.elf
.elfhdr
, sizeof(fmap
->u
.elf
.elfhdr
), 0))
318 /* and check for an ELF header */
319 if (memcmp(fmap
->u
.elf
.elfhdr
.e_ident
,
320 elf_signature
, sizeof(elf_signature
))) goto done
;
321 /* and check 32 vs 64 size according to current machine */
323 if (fmap
->u
.elf
.elfhdr
.e_ident
[EI_CLASS
] != ELFCLASS64
) goto done
;
325 if (fmap
->u
.elf
.elfhdr
.e_ident
[EI_CLASS
] != ELFCLASS32
) goto done
;
327 fmap
->addr_size
= fmap
->u
.elf
.elfhdr
.e_ident
[EI_CLASS
] == ELFCLASS64
? 64 : 32;
328 fmap
->u
.elf
.sect
= HeapAlloc(GetProcessHeap(), 0,
329 fmap
->u
.elf
.elfhdr
.e_shnum
* sizeof(fmap
->u
.elf
.sect
[0]));
330 if (!fmap
->u
.elf
.sect
) goto done
;
332 for (i
= 0; i
< fmap
->u
.elf
.elfhdr
.e_shnum
; i
++)
334 if (!elf_map_file_read(fmap
, emfd
, &fmap
->u
.elf
.sect
[i
].shdr
, sizeof(fmap
->u
.elf
.sect
[i
].shdr
),
335 fmap
->u
.elf
.elfhdr
.e_shoff
+ i
* sizeof(fmap
->u
.elf
.sect
[i
].shdr
)))
337 HeapFree(GetProcessHeap(), 0, fmap
->u
.elf
.sect
);
338 fmap
->u
.elf
.sect
= NULL
;
341 fmap
->u
.elf
.sect
[i
].mapped
= IMAGE_NO_MAP
;
344 /* grab size of module once loaded in memory */
345 fmap
->u
.elf
.elf_size
= 0;
346 fmap
->u
.elf
.elf_start
= ~0L;
347 for (i
= 0; i
< fmap
->u
.elf
.elfhdr
.e_phnum
; i
++)
349 if (elf_map_file_read(fmap
, emfd
, &phdr
, sizeof(phdr
),
350 fmap
->u
.elf
.elfhdr
.e_phoff
+ i
* sizeof(phdr
)) &&
351 phdr
.p_type
== PT_LOAD
)
353 tmp
= (phdr
.p_vaddr
+ phdr
.p_memsz
+ page_mask
) & ~page_mask
;
354 if (fmap
->u
.elf
.elf_size
< tmp
) fmap
->u
.elf
.elf_size
= tmp
;
355 if (phdr
.p_vaddr
< fmap
->u
.elf
.elf_start
) fmap
->u
.elf
.elf_start
= phdr
.p_vaddr
;
358 /* if non relocatable ELF, then remove fixed address from computation
359 * otherwise, all addresses are zero based and start has no effect
361 fmap
->u
.elf
.elf_size
-= fmap
->u
.elf
.elf_start
;
365 case from_file
: break;
367 if (!(fmap
->u
.elf
.target_copy
= HeapAlloc(GetProcessHeap(), 0, fmap
->u
.elf
.elf_size
)))
369 HeapFree(GetProcessHeap(), 0, fmap
->u
.elf
.sect
);
372 if (!ReadProcessMemory(emfd
->u
.process
.handle
, emfd
->u
.process
.load_addr
, fmap
->u
.elf
.target_copy
,
373 fmap
->u
.elf
.elf_size
, NULL
))
375 HeapFree(GetProcessHeap(), 0, fmap
->u
.elf
.target_copy
);
376 HeapFree(GetProcessHeap(), 0, fmap
->u
.elf
.sect
);
383 HeapFree(GetProcessHeap(), 0, filename
);
387 /******************************************************************
390 * Unmaps an ELF file from memory (previously mapped with elf_map_file)
392 static void elf_unmap_file(struct image_file_map
* fmap
)
396 if (fmap
->u
.elf
.fd
!= -1)
398 struct image_section_map ism
;
400 for (ism
.sidx
= 0; ism
.sidx
< fmap
->u
.elf
.elfhdr
.e_shnum
; ism
.sidx
++)
402 elf_unmap_section(&ism
);
404 HeapFree(GetProcessHeap(), 0, fmap
->u
.elf
.sect
);
405 close(fmap
->u
.elf
.fd
);
407 HeapFree(GetProcessHeap(), 0, fmap
->u
.elf
.target_copy
);
408 fmap
= fmap
->u
.elf
.alternate
;
412 static void elf_module_remove(struct process
* pcs
, struct module_format
* modfmt
)
414 elf_unmap_file(&modfmt
->u
.elf_info
->file_map
);
415 HeapFree(GetProcessHeap(), 0, modfmt
);
418 /******************************************************************
419 * elf_is_in_thunk_area
421 * Check whether an address lies within one of the thunk area we
424 int elf_is_in_thunk_area(unsigned long addr
,
425 const struct elf_thunk_area
* thunks
)
429 if (thunks
) for (i
= 0; thunks
[i
].symname
; i
++)
431 if (addr
>= thunks
[i
].rva_start
&& addr
< thunks
[i
].rva_end
)
437 /******************************************************************
440 * creating an internal hash table to ease use ELF symtab information lookup
442 static void elf_hash_symtab(struct module
* module
, struct pool
* pool
,
443 struct hash_table
* ht_symtab
, struct image_file_map
* fmap
,
444 struct elf_thunk_area
* thunks
)
449 struct symt_compiland
* compiland
= NULL
;
452 struct symtab_elt
* ste
;
453 struct image_section_map ism
, ism_str
;
455 if (!elf_find_section(fmap
, ".symtab", SHT_SYMTAB
, &ism
) &&
456 !elf_find_section(fmap
, ".dynsym", SHT_DYNSYM
, &ism
)) return;
457 if ((symp
= (const Elf_Sym
*)image_map_section(&ism
)) == IMAGE_NO_MAP
) return;
458 ism_str
.fmap
= ism
.fmap
;
459 ism_str
.sidx
= fmap
->u
.elf
.sect
[ism
.sidx
].shdr
.sh_link
;
460 if ((strp
= image_map_section(&ism_str
)) == IMAGE_NO_MAP
)
462 image_unmap_section(&ism
);
466 nsym
= image_get_map_size(&ism
) / sizeof(*symp
);
468 for (j
= 0; thunks
[j
].symname
; j
++)
469 thunks
[j
].rva_start
= thunks
[j
].rva_end
= 0;
471 for (i
= 0; i
< nsym
; i
++, symp
++)
473 /* Ignore certain types of entries which really aren't of that much
476 if ((ELF32_ST_TYPE(symp
->st_info
) != STT_NOTYPE
&&
477 ELF32_ST_TYPE(symp
->st_info
) != STT_FILE
&&
478 ELF32_ST_TYPE(symp
->st_info
) != STT_OBJECT
&&
479 ELF32_ST_TYPE(symp
->st_info
) != STT_FUNC
) ||
480 symp
->st_shndx
== SHN_UNDEF
)
485 symname
= strp
+ symp
->st_name
;
487 /* handle some specific symtab (that we'll throw away when done) */
488 switch (ELF32_ST_TYPE(symp
->st_info
))
492 compiland
= symt_new_compiland(module
, symp
->st_value
,
493 source_new(module
, NULL
, symname
));
498 /* we are only interested in wine markers inserted by winebuild */
499 for (j
= 0; thunks
[j
].symname
; j
++)
501 if (!strcmp(symname
, thunks
[j
].symname
))
503 thunks
[j
].rva_start
= symp
->st_value
;
504 thunks
[j
].rva_end
= symp
->st_value
+ symp
->st_size
;
511 /* FIXME: we don't need to handle them (GCC internals)
512 * Moreover, they screw up our symbol lookup :-/
514 if (symname
[0] == '.' && symname
[1] == 'L' && isdigit(symname
[2]))
517 ste
= pool_alloc(pool
, sizeof(*ste
));
518 ste
->ht_elt
.name
= symname
;
519 /* GCC emits, in some cases, a .<digit>+ suffix.
520 * This is used for static variable inside functions, so
521 * that we can have several such variables with same name in
522 * the same compilation unit
523 * We simply ignore that suffix when present (we also get rid
524 * of it in stabs parsing)
526 ptr
= symname
+ strlen(symname
) - 1;
529 while (isdigit(*ptr
) && ptr
>= symname
) ptr
--;
530 if (ptr
> symname
&& *ptr
== '.')
532 char* n
= pool_alloc(pool
, ptr
- symname
+ 1);
533 memcpy(n
, symname
, ptr
- symname
+ 1);
534 n
[ptr
- symname
] = '\0';
535 ste
->ht_elt
.name
= n
;
539 ste
->compiland
= compiland
;
541 hash_table_add(ht_symtab
, &ste
->ht_elt
);
543 /* as we added in the ht_symtab pointers to the symbols themselves,
544 * we cannot unmap yet the sections, it will be done when we're over
549 /******************************************************************
552 * lookup a symbol by name in our internal hash table for the symtab
554 static const Elf_Sym
* elf_lookup_symtab(const struct module
* module
,
555 const struct hash_table
* ht_symtab
,
556 const char* name
, const struct symt
* compiland
)
558 struct symtab_elt
* weak_result
= NULL
; /* without compiland name */
559 struct symtab_elt
* result
= NULL
;
560 struct hash_table_iter hti
;
561 struct symtab_elt
* ste
;
562 const char* compiland_name
;
563 const char* compiland_basename
;
566 /* we need weak match up (at least) when symbols of same name,
567 * defined several times in different compilation units,
568 * are merged in a single one (hence a different filename for c.u.)
572 compiland_name
= source_get(module
,
573 ((const struct symt_compiland
*)compiland
)->source
);
574 compiland_basename
= strrchr(compiland_name
, '/');
575 if (!compiland_basename
++) compiland_basename
= compiland_name
;
577 else compiland_name
= compiland_basename
= NULL
;
579 hash_table_iter_init(ht_symtab
, &hti
, name
);
580 while ((ste
= hash_table_iter_up(&hti
)))
582 if (ste
->used
|| strcmp(ste
->ht_elt
.name
, name
)) continue;
585 if ((ste
->compiland
&& !compiland_name
) || (!ste
->compiland
&& compiland_name
))
587 if (ste
->compiland
&& compiland_name
)
589 const char* filename
= source_get(module
, ste
->compiland
->source
);
590 if (strcmp(filename
, compiland_name
))
592 base
= strrchr(filename
, '/');
593 if (!base
++) base
= filename
;
594 if (strcmp(base
, compiland_basename
)) continue;
599 FIXME("Already found symbol %s (%s) in symtab %s @%08x and %s @%08x\n",
600 name
, compiland_name
,
601 source_get(module
, result
->compiland
->source
), (unsigned int)result
->symp
->st_value
,
602 source_get(module
, ste
->compiland
->source
), (unsigned int)ste
->symp
->st_value
);
610 if (!result
&& !(result
= weak_result
))
612 FIXME("Couldn't find symbol %s!%s in symtab\n",
613 debugstr_w(module
->module
.ModuleName
), name
);
619 /******************************************************************
620 * elf_finish_stabs_info
622 * - get any relevant information (address & size) from the bits we got from the
623 * stabs debugging information
625 static void elf_finish_stabs_info(struct module
* module
, const struct hash_table
* symtab
)
627 struct hash_table_iter hti
;
631 struct elf_module_info
* elf_info
= module
->format_info
[DFI_ELF
]->u
.elf_info
;
633 hash_table_iter_init(&module
->ht_symbols
, &hti
, NULL
);
634 while ((ptr
= hash_table_iter_up(&hti
)))
636 sym
= GET_ENTRY(ptr
, struct symt_ht
, hash_elt
);
637 switch (sym
->symt
.tag
)
640 if (((struct symt_function
*)sym
)->address
!= elf_info
->elf_addr
&&
641 ((struct symt_function
*)sym
)->size
)
645 symp
= elf_lookup_symtab(module
, symtab
, sym
->hash_elt
.name
,
646 ((struct symt_function
*)sym
)->container
);
649 if (((struct symt_function
*)sym
)->address
!= elf_info
->elf_addr
&&
650 ((struct symt_function
*)sym
)->address
!= elf_info
->elf_addr
+ symp
->st_value
)
651 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
652 sym
, debugstr_w(module
->module
.ModuleName
), sym
->hash_elt
.name
,
653 ((struct symt_function
*)sym
)->address
, elf_info
->elf_addr
+ symp
->st_value
);
654 if (((struct symt_function
*)sym
)->size
&& ((struct symt_function
*)sym
)->size
!= symp
->st_size
)
655 FIXME("Changing size for %p/%s!%s from %08lx to %08x\n",
656 sym
, debugstr_w(module
->module
.ModuleName
), sym
->hash_elt
.name
,
657 ((struct symt_function
*)sym
)->size
, (unsigned int)symp
->st_size
);
659 ((struct symt_function
*)sym
)->address
= elf_info
->elf_addr
+ symp
->st_value
;
660 ((struct symt_function
*)sym
)->size
= symp
->st_size
;
662 FIXME("Couldn't find %s!%s\n",
663 debugstr_w(module
->module
.ModuleName
), sym
->hash_elt
.name
);
666 switch (((struct symt_data
*)sym
)->kind
)
669 case DataIsFileStatic
:
670 if (((struct symt_data
*)sym
)->u
.var
.kind
!= loc_absolute
||
671 ((struct symt_data
*)sym
)->u
.var
.offset
!= elf_info
->elf_addr
)
673 symp
= elf_lookup_symtab(module
, symtab
, sym
->hash_elt
.name
,
674 ((struct symt_data
*)sym
)->container
);
677 if (((struct symt_data
*)sym
)->u
.var
.offset
!= elf_info
->elf_addr
&&
678 ((struct symt_data
*)sym
)->u
.var
.offset
!= elf_info
->elf_addr
+ symp
->st_value
)
679 FIXME("Changing address for %p/%s!%s from %08lx to %08lx\n",
680 sym
, debugstr_w(module
->module
.ModuleName
), sym
->hash_elt
.name
,
681 ((struct symt_function
*)sym
)->address
, elf_info
->elf_addr
+ symp
->st_value
);
682 ((struct symt_data
*)sym
)->u
.var
.offset
= elf_info
->elf_addr
+ symp
->st_value
;
683 ((struct symt_data
*)sym
)->kind
= (ELF32_ST_BIND(symp
->st_info
) == STB_LOCAL
) ?
684 DataIsFileStatic
: DataIsGlobal
;
686 FIXME("Couldn't find %s!%s\n",
687 debugstr_w(module
->module
.ModuleName
), sym
->hash_elt
.name
);
693 FIXME("Unsupported tag %u\n", sym
->symt
.tag
);
697 /* since we may have changed some addresses & sizes, mark the module to be resorted */
698 module
->sortlist_valid
= FALSE
;
701 /******************************************************************
702 * elf_load_wine_thunks
704 * creating the thunk objects for a wine native DLL
706 static int elf_new_wine_thunks(struct module
* module
, const struct hash_table
* ht_symtab
,
707 const struct elf_thunk_area
* thunks
)
710 struct hash_table_iter hti
;
711 struct symtab_elt
* ste
;
713 struct symt_ht
* symt
;
715 hash_table_iter_init(ht_symtab
, &hti
, NULL
);
716 while ((ste
= hash_table_iter_up(&hti
)))
718 if (ste
->used
) continue;
720 addr
= module
->reloc_delta
+ ste
->symp
->st_value
;
722 j
= elf_is_in_thunk_area(ste
->symp
->st_value
, thunks
);
723 if (j
>= 0) /* thunk found */
725 symt_new_thunk(module
, ste
->compiland
, ste
->ht_elt
.name
, thunks
[j
].ordinal
,
726 addr
, ste
->symp
->st_size
);
733 symt
= symt_find_nearest(module
, addr
);
734 if (symt
&& !symt_get_address(&symt
->symt
, &ref_addr
))
736 if (!symt
|| addr
!= ref_addr
)
738 /* creating public symbols for all the ELF symbols which haven't been
739 * used yet (ie we have no debug information on them)
740 * That's the case, for example, of the .spec.c files
742 switch (ELF32_ST_TYPE(ste
->symp
->st_info
))
745 symt_new_function(module
, ste
->compiland
, ste
->ht_elt
.name
,
746 addr
, ste
->symp
->st_size
, NULL
);
749 loc
.kind
= loc_absolute
;
752 symt_new_global_variable(module
, ste
->compiland
, ste
->ht_elt
.name
,
753 ELF32_ST_BIND(ste
->symp
->st_info
) == STB_LOCAL
,
754 loc
, ste
->symp
->st_size
, NULL
);
757 FIXME("Shouldn't happen\n");
760 /* FIXME: this is a hack !!!
761 * we are adding new symbols, but as we're parsing a symbol table
762 * (hopefully without duplicate symbols) we delay rebuilding the sorted
763 * module table until we're done with the symbol table
764 * Otherwise, as we intertwine symbols' add and lookup, performance
767 module
->sortlist_valid
= TRUE
;
771 /* see comment above */
772 module
->sortlist_valid
= FALSE
;
776 /******************************************************************
777 * elf_new_public_symbols
779 * Creates a set of public symbols from an ELF symtab
781 static int elf_new_public_symbols(struct module
* module
, const struct hash_table
* symtab
)
783 struct hash_table_iter hti
;
784 struct symtab_elt
* ste
;
786 if (dbghelp_options
& SYMOPT_NO_PUBLICS
) return TRUE
;
788 /* FIXME: we're missing the ELF entry point here */
790 hash_table_iter_init(symtab
, &hti
, NULL
);
791 while ((ste
= hash_table_iter_up(&hti
)))
793 symt_new_public(module
, ste
->compiland
, ste
->ht_elt
.name
,
794 module
->reloc_delta
+ ste
->symp
->st_value
,
800 static BOOL
elf_check_debug_link(const WCHAR
* file
, struct image_file_map
* fmap
, DWORD crc
)
803 struct elf_map_file_data emfd
;
805 emfd
.kind
= from_file
;
806 emfd
.u
.file
.filename
= file
;
807 if (!elf_map_file(&emfd
, fmap
)) return FALSE
;
808 if (!(ret
= crc
== calc_crc32(fmap
->u
.elf
.fd
)))
810 WARN("Bad CRC for file %s (got %08x while expecting %08x)\n",
811 debugstr_w(file
), calc_crc32(fmap
->u
.elf
.fd
), crc
);
812 elf_unmap_file(fmap
);
817 /******************************************************************
818 * elf_locate_debug_link
820 * Locate a filename from a .gnu_debuglink section, using the same
822 * "If the full name of the directory containing the executable is
823 * execdir, and the executable has a debug link that specifies the
824 * name debugfile, then GDB will automatically search for the
825 * debugging information file in three places:
826 * - the directory containing the executable file (that is, it
827 * will look for a file named `execdir/debugfile',
828 * - a subdirectory of that directory named `.debug' (that is, the
829 * file `execdir/.debug/debugfile', and
830 * - a subdirectory of the global debug file directory that includes
831 * the executable's full path, and the name from the link (that is,
832 * the file `globaldebugdir/execdir/debugfile', where globaldebugdir
833 * is the global debug file directory, and execdir has been turned
834 * into a relative path)." (from GDB manual)
836 static BOOL
elf_locate_debug_link(struct image_file_map
* fmap
, const char* filename
,
837 const WCHAR
* loaded_file
, DWORD crc
)
839 static const WCHAR globalDebugDirW
[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
840 static const WCHAR dotDebugW
[] = {'.','d','e','b','u','g','/'};
841 const size_t globalDebugDirLen
= sizeof(globalDebugDirW
) / sizeof(WCHAR
);
845 struct image_file_map
* fmap_link
= NULL
;
847 fmap_link
= HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link
));
848 if (!fmap_link
) return FALSE
;
850 filename_len
= MultiByteToWideChar(CP_UNIXCP
, 0, filename
, -1, NULL
, 0);
851 p
= HeapAlloc(GetProcessHeap(), 0,
852 (globalDebugDirLen
+ strlenW(loaded_file
) + 6 + 1 + filename_len
+ 1) * sizeof(WCHAR
));
855 /* we prebuild the string with "execdir" */
856 strcpyW(p
, loaded_file
);
857 slash
= strrchrW(p
, '/');
858 if (slash
== NULL
) slash
= p
; else slash
++;
860 /* testing execdir/filename */
861 MultiByteToWideChar(CP_UNIXCP
, 0, filename
, -1, slash
, filename_len
);
862 if (elf_check_debug_link(p
, fmap_link
, crc
)) goto found
;
864 /* testing execdir/.debug/filename */
865 memcpy(slash
, dotDebugW
, sizeof(dotDebugW
));
866 MultiByteToWideChar(CP_UNIXCP
, 0, filename
, -1, slash
+ sizeof(dotDebugW
) / sizeof(WCHAR
), filename_len
);
867 if (elf_check_debug_link(p
, fmap_link
, crc
)) goto found
;
869 /* testing globaldebugdir/execdir/filename */
870 memmove(p
+ globalDebugDirLen
, p
, (slash
- p
) * sizeof(WCHAR
));
871 memcpy(p
, globalDebugDirW
, globalDebugDirLen
* sizeof(WCHAR
));
872 slash
+= globalDebugDirLen
;
873 MultiByteToWideChar(CP_UNIXCP
, 0, filename
, -1, slash
, filename_len
);
874 if (elf_check_debug_link(p
, fmap_link
, crc
)) goto found
;
876 /* finally testing filename */
877 if (elf_check_debug_link(slash
, fmap_link
, crc
)) goto found
;
880 WARN("Couldn't locate or map %s\n", filename
);
881 HeapFree(GetProcessHeap(), 0, p
);
882 HeapFree(GetProcessHeap(), 0, fmap_link
);
886 TRACE("Located debug information file %s at %s\n", filename
, debugstr_w(p
));
887 HeapFree(GetProcessHeap(), 0, p
);
888 fmap
->u
.elf
.alternate
= fmap_link
;
892 /******************************************************************
893 * elf_locate_build_id_target
895 * Try to find the .so file containing the debug info out of the build-id note information
897 static BOOL
elf_locate_build_id_target(struct image_file_map
* fmap
, const BYTE
* id
, unsigned idlen
)
899 static const WCHAR globalDebugDirW
[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
900 static const WCHAR buildidW
[] = {'.','b','u','i','l','d','-','i','d','/'};
901 static const WCHAR dotDebug0W
[] = {'.','d','e','b','u','g',0};
902 struct image_file_map
* fmap_link
= NULL
;
905 const BYTE
* idend
= id
+ idlen
;
906 struct elf_map_file_data emfd
;
908 fmap_link
= HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link
));
909 if (!fmap_link
) return FALSE
;
911 p
= HeapAlloc(GetProcessHeap(), 0,
912 sizeof(globalDebugDirW
) + sizeof(buildidW
) +
913 (idlen
* 2 + 1) * sizeof(WCHAR
) + sizeof(dotDebug0W
));
915 memcpy(z
, globalDebugDirW
, sizeof(globalDebugDirW
));
916 z
+= sizeof(globalDebugDirW
) / sizeof(WCHAR
);
917 memcpy(z
, buildidW
, sizeof(buildidW
));
918 z
+= sizeof(buildidW
) / sizeof(WCHAR
);
922 *z
++ = "0123456789abcdef"[*id
>> 4 ];
923 *z
++ = "0123456789abcdef"[*id
& 0x0F];
930 *z
++ = "0123456789abcdef"[*id
>> 4 ];
931 *z
++ = "0123456789abcdef"[*id
& 0x0F];
934 memcpy(z
, dotDebug0W
, sizeof(dotDebug0W
));
935 TRACE("checking %s\n", wine_dbgstr_w(p
));
937 emfd
.kind
= from_file
;
938 emfd
.u
.file
.filename
= p
;
939 if (elf_map_file(&emfd
, fmap_link
))
941 struct image_section_map buildid_sect
;
942 if (elf_find_section(fmap_link
, ".note.gnu.build-id", SHT_NULL
, &buildid_sect
))
944 const uint32_t* note
;
946 note
= (const uint32_t*)image_map_section(&buildid_sect
);
947 if (note
!= IMAGE_NO_MAP
)
949 /* the usual ELF note structure: name-size desc-size type <name> <desc> */
950 if (note
[2] == NT_GNU_BUILD_ID
)
952 if (note
[1] == idlen
&&
953 !memcmp(note
+ 3 + ((note
[0] + 3) >> 2), idend
- idlen
, idlen
))
955 TRACE("Located debug information file at %s\n", debugstr_w(p
));
956 HeapFree(GetProcessHeap(), 0, p
);
957 fmap
->u
.elf
.alternate
= fmap_link
;
960 WARN("mismatch in buildid information for %s\n", wine_dbgstr_w(p
));
963 image_unmap_section(&buildid_sect
);
965 elf_unmap_file(fmap_link
);
968 TRACE("not found\n");
969 HeapFree(GetProcessHeap(), 0, p
);
970 HeapFree(GetProcessHeap(), 0, fmap_link
);
974 /******************************************************************
975 * elf_check_alternate
977 * Load alternate files for a given ELF file, looking at either .note.gnu_build-id
978 * or .gnu_debuglink sections.
980 static BOOL
elf_check_alternate(struct image_file_map
* fmap
, const struct module
* module
)
984 struct image_section_map buildid_sect
, debuglink_sect
;
986 /* if present, add the .gnu_debuglink file as an alternate to current one */
987 if (elf_find_section(fmap
, ".note.gnu.build-id", SHT_NULL
, &buildid_sect
))
989 const uint32_t* note
;
992 note
= (const uint32_t*)image_map_section(&buildid_sect
);
993 if (note
!= IMAGE_NO_MAP
)
995 /* the usual ELF note structure: name-size desc-size type <name> <desc> */
996 if (note
[2] == NT_GNU_BUILD_ID
)
998 ret
= elf_locate_build_id_target(fmap
, (const BYTE
*)(note
+ 3 + ((note
[0] + 3) >> 2)), note
[1]);
1001 image_unmap_section(&buildid_sect
);
1003 /* if present, add the .gnu_debuglink file as an alternate to current one */
1004 if (!ret
&& elf_find_section(fmap
, ".gnu_debuglink", SHT_NULL
, &debuglink_sect
))
1006 const char* dbg_link
;
1009 dbg_link
= (const char*)image_map_section(&debuglink_sect
);
1010 if (dbg_link
!= IMAGE_NO_MAP
)
1012 /* The content of a debug link section is:
1013 * 1/ a NULL terminated string, containing the file name for the
1015 * 2/ padding on 4 byte boundary
1016 * 3/ CRC of the linked ELF file
1018 DWORD crc
= *(const DWORD
*)(dbg_link
+ ((DWORD_PTR
)(strlen(dbg_link
) + 4) & ~3));
1019 ret
= elf_locate_debug_link(fmap
, dbg_link
, module
->module
.LoadedImageName
, crc
);
1021 WARN("Couldn't load linked debug file for %s\n",
1022 debugstr_w(module
->module
.ModuleName
));
1024 image_unmap_section(&debuglink_sect
);
1026 return found
? ret
: TRUE
;
1029 /******************************************************************
1030 * elf_load_debug_info_from_map
1032 * Loads the symbolic information from ELF module which mapping is described
1034 * the module has been loaded at 'load_offset' address, so symbols' address
1035 * relocation is performed.
1036 * CRC is checked if fmap->with_crc is TRUE
1038 * 0 if the file doesn't contain symbolic info (or this info cannot be
1042 static BOOL
elf_load_debug_info_from_map(struct module
* module
,
1043 struct image_file_map
* fmap
,
1045 struct hash_table
* ht_symtab
)
1047 BOOL ret
= FALSE
, lret
;
1048 struct elf_thunk_area thunks
[] =
1050 {"__wine_spec_import_thunks", THUNK_ORDINAL_NOTYPE
, 0, 0}, /* inter DLL calls */
1051 {"__wine_spec_delayed_import_loaders", THUNK_ORDINAL_LOAD
, 0, 0}, /* delayed inter DLL calls */
1052 {"__wine_spec_delayed_import_thunks", THUNK_ORDINAL_LOAD
, 0, 0}, /* delayed inter DLL calls */
1053 {"__wine_delay_load", THUNK_ORDINAL_LOAD
, 0, 0}, /* delayed inter DLL calls */
1054 {"__wine_spec_thunk_text_16", -16, 0, 0}, /* 16 => 32 thunks */
1055 {"__wine_spec_thunk_text_32", -32, 0, 0}, /* 32 => 16 thunks */
1059 module
->module
.SymType
= SymExport
;
1061 /* create a hash table for the symtab */
1062 elf_hash_symtab(module
, pool
, ht_symtab
, fmap
, thunks
);
1064 if (!(dbghelp_options
& SYMOPT_PUBLICS_ONLY
))
1066 struct image_section_map stab_sect
, stabstr_sect
;
1068 /* check if we need an alternate file (from debuglink or build-id) */
1069 ret
= elf_check_alternate(fmap
, module
);
1071 if (elf_find_section(fmap
, ".stab", SHT_NULL
, &stab_sect
) &&
1072 elf_find_section(fmap
, ".stabstr", SHT_NULL
, &stabstr_sect
))
1075 const char* stabstr
;
1077 stab
= image_map_section(&stab_sect
);
1078 stabstr
= image_map_section(&stabstr_sect
);
1079 if (stab
!= IMAGE_NO_MAP
&& stabstr
!= IMAGE_NO_MAP
)
1081 /* OK, now just parse all of the stabs. */
1082 lret
= stabs_parse(module
, module
->format_info
[DFI_ELF
]->u
.elf_info
->elf_addr
,
1083 stab
, image_get_map_size(&stab_sect
),
1084 stabstr
, image_get_map_size(&stabstr_sect
),
1087 /* and fill in the missing information for stabs */
1088 elf_finish_stabs_info(module
, ht_symtab
);
1090 WARN("Couldn't correctly read stabs\n");
1093 image_unmap_section(&stab_sect
);
1094 image_unmap_section(&stabstr_sect
);
1096 lret
= dwarf2_parse(module
, module
->reloc_delta
, thunks
, fmap
);
1099 if (strstrW(module
->module
.ModuleName
, S_ElfW
) ||
1100 !strcmpW(module
->module
.ModuleName
, S_WineLoaderW
))
1102 /* add the thunks for native libraries */
1103 if (!(dbghelp_options
& SYMOPT_PUBLICS_ONLY
))
1104 elf_new_wine_thunks(module
, ht_symtab
, thunks
);
1106 /* add all the public symbols from symtab */
1107 if (elf_new_public_symbols(module
, ht_symtab
) && !ret
) ret
= TRUE
;
1112 /******************************************************************
1113 * elf_load_debug_info
1115 * Loads ELF debugging information from the module image file.
1117 BOOL
elf_load_debug_info(struct module
* module
)
1121 struct hash_table ht_symtab
;
1122 struct module_format
* modfmt
;
1124 if (module
->type
!= DMT_ELF
|| !(modfmt
= module
->format_info
[DFI_ELF
]) || !modfmt
->u
.elf_info
)
1126 ERR("Bad elf module '%s'\n", debugstr_w(module
->module
.LoadedImageName
));
1130 pool_init(&pool
, 65536);
1131 hash_table_init(&pool
, &ht_symtab
, 256);
1133 ret
= elf_load_debug_info_from_map(module
, &modfmt
->u
.elf_info
->file_map
, &pool
, &ht_symtab
);
1135 pool_destroy(&pool
);
1139 /******************************************************************
1140 * elf_fetch_file_info
1142 * Gathers some more information for an ELF module from a given file
1144 BOOL
elf_fetch_file_info(const WCHAR
* name
, DWORD_PTR
* base
,
1145 DWORD
* size
, DWORD
* checksum
)
1147 struct image_file_map fmap
;
1149 struct elf_map_file_data emfd
;
1151 emfd
.kind
= from_file
;
1152 emfd
.u
.file
.filename
= name
;
1153 if (!elf_map_file(&emfd
, &fmap
)) return FALSE
;
1154 if (base
) *base
= fmap
.u
.elf
.elf_start
;
1155 *size
= fmap
.u
.elf
.elf_size
;
1156 *checksum
= calc_crc32(fmap
.u
.elf
.fd
);
1157 elf_unmap_file(&fmap
);
1161 static BOOL
elf_load_file_from_fmap(struct process
* pcs
, const WCHAR
* filename
,
1162 struct image_file_map
* fmap
, unsigned long load_offset
,
1163 unsigned long dyn_addr
, struct elf_info
* elf_info
)
1167 if (elf_info
->flags
& ELF_INFO_DEBUG_HEADER
)
1169 struct image_section_map ism
;
1171 if (elf_find_section(fmap
, ".dynamic", SHT_DYNAMIC
, &ism
))
1174 char* ptr
= (char*)fmap
->u
.elf
.sect
[ism
.sidx
].shdr
.sh_addr
;
1179 if (!ReadProcessMemory(pcs
->handle
, ptr
, &dyn
, sizeof(dyn
), &len
) ||
1182 if (dyn
.d_tag
== DT_DEBUG
)
1184 elf_info
->dbg_hdr_addr
= dyn
.d_un
.d_ptr
;
1185 if (load_offset
== 0 && dyn_addr
== 0) /* likely the case */
1186 /* Assume this module (the Wine loader) has been loaded at its preferred address */
1187 dyn_addr
= ism
.fmap
->u
.elf
.sect
[ism
.sidx
].shdr
.sh_addr
;
1191 } while (dyn
.d_tag
!= DT_NULL
);
1192 if (dyn
.d_tag
== DT_NULL
) return ret
;
1197 if (elf_info
->flags
& ELF_INFO_MODULE
)
1199 struct elf_module_info
*elf_module_info
;
1200 struct module_format
* modfmt
;
1201 struct image_section_map ism
;
1202 unsigned long modbase
= load_offset
;
1204 if (elf_find_section(fmap
, ".dynamic", SHT_DYNAMIC
, &ism
))
1206 unsigned long rva_dyn
= elf_get_map_rva(&ism
);
1208 TRACE("For module %s, got ELF (start=%lx dyn=%lx), link_map (start=%lx dyn=%lx)\n",
1209 debugstr_w(filename
), (unsigned long)fmap
->u
.elf
.elf_start
, rva_dyn
,
1210 load_offset
, dyn_addr
);
1211 if (dyn_addr
&& load_offset
+ rva_dyn
!= dyn_addr
)
1213 WARN("\thave to relocate: %lx\n", dyn_addr
- rva_dyn
);
1214 modbase
= dyn_addr
- rva_dyn
;
1216 } else WARN("For module %s, no .dynamic section\n", debugstr_w(filename
));
1219 modfmt
= HeapAlloc(GetProcessHeap(), 0,
1220 sizeof(struct module_format
) + sizeof(struct elf_module_info
));
1221 if (!modfmt
) return FALSE
;
1222 elf_info
->module
= module_new(pcs
, filename
, DMT_ELF
, FALSE
, modbase
,
1223 fmap
->u
.elf
.elf_size
, 0, calc_crc32(fmap
->u
.elf
.fd
));
1224 if (!elf_info
->module
)
1226 HeapFree(GetProcessHeap(), 0, modfmt
);
1229 elf_info
->module
->reloc_delta
= elf_info
->module
->module
.BaseOfImage
- fmap
->u
.elf
.elf_start
;
1230 elf_module_info
= (void*)(modfmt
+ 1);
1231 elf_info
->module
->format_info
[DFI_ELF
] = modfmt
;
1232 modfmt
->module
= elf_info
->module
;
1233 modfmt
->remove
= elf_module_remove
;
1234 modfmt
->loc_compute
= NULL
;
1235 modfmt
->u
.elf_info
= elf_module_info
;
1237 elf_module_info
->elf_addr
= load_offset
;
1239 elf_module_info
->file_map
= *fmap
;
1240 elf_reset_file_map(fmap
);
1241 if (dbghelp_options
& SYMOPT_DEFERRED_LOADS
)
1243 elf_info
->module
->module
.SymType
= SymDeferred
;
1246 else ret
= elf_load_debug_info(elf_info
->module
);
1248 elf_module_info
->elf_mark
= 1;
1249 elf_module_info
->elf_loader
= 0;
1252 if (elf_info
->flags
& ELF_INFO_NAME
)
1255 ptr
= HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename
) + 1) * sizeof(WCHAR
));
1258 strcpyW(ptr
, filename
);
1259 elf_info
->module_name
= ptr
;
1267 /******************************************************************
1270 * Loads the information for ELF module stored in 'filename'
1271 * the module has been loaded at 'load_offset' address
1273 * -1 if the file cannot be found/opened
1274 * 0 if the file doesn't contain symbolic info (or this info cannot be
1278 static BOOL
elf_load_file(struct process
* pcs
, const WCHAR
* filename
,
1279 unsigned long load_offset
, unsigned long dyn_addr
,
1280 struct elf_info
* elf_info
)
1283 struct image_file_map fmap
;
1284 struct elf_map_file_data emfd
;
1286 TRACE("Processing elf file '%s' at %08lx\n", debugstr_w(filename
), load_offset
);
1288 emfd
.kind
= from_file
;
1289 emfd
.u
.file
.filename
= filename
;
1290 if (!elf_map_file(&emfd
, &fmap
)) return ret
;
1292 /* Next, we need to find a few of the internal ELF headers within
1293 * this thing. We need the main executable header, and the section
1296 if (!fmap
.u
.elf
.elf_start
&& !load_offset
)
1297 ERR("Relocatable ELF %s, but no load address. Loading at 0x0000000\n",
1298 debugstr_w(filename
));
1300 ret
= elf_load_file_from_fmap(pcs
, filename
, &fmap
, load_offset
, dyn_addr
, elf_info
);
1302 elf_unmap_file(&fmap
);
1307 /******************************************************************
1308 * elf_load_file_from_path
1309 * tries to load an ELF file from a set of paths (separated by ':')
1311 static BOOL
elf_load_file_from_path(HANDLE hProcess
,
1312 const WCHAR
* filename
,
1313 unsigned long load_offset
,
1314 unsigned long dyn_addr
,
1316 struct elf_info
* elf_info
)
1320 WCHAR
* pathW
= NULL
;
1323 if (!path
) return FALSE
;
1325 len
= MultiByteToWideChar(CP_UNIXCP
, 0, path
, -1, NULL
, 0);
1326 pathW
= HeapAlloc(GetProcessHeap(), 0, len
* sizeof(WCHAR
));
1327 if (!pathW
) return FALSE
;
1328 MultiByteToWideChar(CP_UNIXCP
, 0, path
, -1, pathW
, len
);
1330 for (s
= pathW
; s
&& *s
; s
= (t
) ? (t
+1) : NULL
)
1332 t
= strchrW(s
, ':');
1334 fn
= HeapAlloc(GetProcessHeap(), 0, (lstrlenW(filename
) + 1 + lstrlenW(s
) + 1) * sizeof(WCHAR
));
1337 strcatW(fn
, S_SlashW
);
1338 strcatW(fn
, filename
);
1339 ret
= elf_load_file(hProcess
, fn
, load_offset
, dyn_addr
, elf_info
);
1340 HeapFree(GetProcessHeap(), 0, fn
);
1344 HeapFree(GetProcessHeap(), 0, pathW
);
1348 /******************************************************************
1349 * elf_load_file_from_dll_path
1351 * Tries to load an ELF file from the dll path
1353 static BOOL
elf_load_file_from_dll_path(HANDLE hProcess
,
1354 const WCHAR
* filename
,
1355 unsigned long load_offset
,
1356 unsigned long dyn_addr
,
1357 struct elf_info
* elf_info
)
1360 unsigned int index
= 0;
1363 while (!ret
&& (path
= wine_dll_enum_load_path( index
++ )))
1368 len
= MultiByteToWideChar(CP_UNIXCP
, 0, path
, -1, NULL
, 0);
1370 name
= HeapAlloc( GetProcessHeap(), 0,
1371 (len
+ lstrlenW(filename
) + 2) * sizeof(WCHAR
) );
1374 MultiByteToWideChar(CP_UNIXCP
, 0, path
, -1, name
, len
);
1375 strcatW( name
, S_SlashW
);
1376 strcatW( name
, filename
);
1377 ret
= elf_load_file(hProcess
, name
, load_offset
, dyn_addr
, elf_info
);
1378 HeapFree( GetProcessHeap(), 0, name
);
1383 #ifdef AT_SYSINFO_EHDR
1384 /******************************************************************
1387 * locate some a value from the debuggee auxiliary vector
1389 static BOOL
elf_search_auxv(const struct process
* pcs
, unsigned type
, unsigned long* val
)
1391 char buffer
[sizeof(SYMBOL_INFO
) + MAX_SYM_NAME
];
1392 SYMBOL_INFO
*si
= (SYMBOL_INFO
*)buffer
;
1398 si
->SizeOfStruct
= sizeof(*si
);
1399 si
->MaxNameLen
= MAX_SYM_NAME
;
1400 if (!SymFromName(pcs
->handle
, "libwine.so.1!__wine_main_environ", si
) ||
1401 !(addr
= (void*)(DWORD_PTR
)si
->Address
) ||
1402 !ReadProcessMemory(pcs
->handle
, addr
, &addr
, sizeof(addr
), NULL
) ||
1405 FIXME("can't find symbol in module\n");
1408 /* walk through envp[] */
1409 /* envp[] strings are located after the auxiliary vector, so protect the walk */
1410 str_max
= (void*)(DWORD_PTR
)~0L;
1411 while (ReadProcessMemory(pcs
->handle
, addr
, &str
, sizeof(str
), NULL
) &&
1412 (addr
= (void*)((DWORD_PTR
)addr
+ sizeof(str
))) != NULL
&& str
!= NULL
)
1413 str_max
= min(str_max
, str
);
1415 /* Walk through the end of envp[] array.
1416 * Actually, there can be several NULLs at the end of envp[]. This happens when an env variable is
1417 * deleted, the last entry is replaced by an extra NULL.
1419 while (addr
< str_max
&& ReadProcessMemory(pcs
->handle
, addr
, &str
, sizeof(str
), NULL
) && str
== NULL
)
1420 addr
= (void*)((DWORD_PTR
)addr
+ sizeof(str
));
1422 while (ReadProcessMemory(pcs
->handle
, addr
, &auxv
, sizeof(auxv
), NULL
) && auxv
.a_type
!= AT_NULL
)
1424 if (auxv
.a_type
== type
)
1426 *val
= auxv
.a_un
.a_val
;
1429 addr
= (void*)((DWORD_PTR
)addr
+ sizeof(auxv
));
1436 /******************************************************************
1437 * elf_search_and_load_file
1439 * lookup a file in standard ELF locations, and if found, load it
1441 static BOOL
elf_search_and_load_file(struct process
* pcs
, const WCHAR
* filename
,
1442 unsigned long load_offset
, unsigned long dyn_addr
,
1443 struct elf_info
* elf_info
)
1446 struct module
* module
;
1447 static WCHAR S_libstdcPPW
[] = {'l','i','b','s','t','d','c','+','+','\0'};
1449 if (filename
== NULL
|| *filename
== '\0') return FALSE
;
1450 if ((module
= module_is_already_loaded(pcs
, filename
)))
1452 elf_info
->module
= module
;
1453 elf_info
->module
->format_info
[DFI_ELF
]->u
.elf_info
->elf_mark
= 1;
1454 return module
->module
.SymType
;
1457 if (strstrW(filename
, S_libstdcPPW
)) return FALSE
; /* We know we can't do it */
1458 ret
= elf_load_file(pcs
, filename
, load_offset
, dyn_addr
, elf_info
);
1459 /* if relative pathname, try some absolute base dirs */
1460 if (!ret
&& !strchrW(filename
, '/'))
1462 ret
= elf_load_file_from_path(pcs
, filename
, load_offset
, dyn_addr
,
1463 getenv("PATH"), elf_info
) ||
1464 elf_load_file_from_path(pcs
, filename
, load_offset
, dyn_addr
,
1465 getenv("LD_LIBRARY_PATH"), elf_info
);
1466 if (!ret
) ret
= elf_load_file_from_dll_path(pcs
, filename
,
1467 load_offset
, dyn_addr
, elf_info
);
1473 typedef BOOL (*enum_elf_modules_cb
)(const WCHAR
*, unsigned long load_addr
,
1474 unsigned long dyn_addr
, BOOL is_system
, void* user
);
1476 /******************************************************************
1477 * elf_enum_modules_internal
1479 * Enumerate ELF modules from a running process
1481 static BOOL
elf_enum_modules_internal(const struct process
* pcs
,
1482 const WCHAR
* main_name
,
1483 enum_elf_modules_cb cb
, void* user
)
1485 struct r_debug dbg_hdr
;
1489 WCHAR bufstrW
[MAX_PATH
];
1491 if (!pcs
->dbg_hdr_addr
||
1492 !ReadProcessMemory(pcs
->handle
, (void*)pcs
->dbg_hdr_addr
,
1493 &dbg_hdr
, sizeof(dbg_hdr
), NULL
))
1496 /* Now walk the linked list. In all known ELF implementations,
1497 * the dynamic loader maintains this linked list for us. In some
1498 * cases the first entry doesn't appear with a name, in other cases it
1501 for (lm_addr
= (void*)dbg_hdr
.r_map
; lm_addr
; lm_addr
= (void*)lm
.l_next
)
1503 if (!ReadProcessMemory(pcs
->handle
, lm_addr
, &lm
, sizeof(lm
), NULL
))
1506 if (lm
.l_prev
!= NULL
&& /* skip first entry, normally debuggee itself */
1507 lm
.l_name
!= NULL
&&
1508 ReadProcessMemory(pcs
->handle
, lm
.l_name
, bufstr
, sizeof(bufstr
), NULL
))
1510 bufstr
[sizeof(bufstr
) - 1] = '\0';
1511 MultiByteToWideChar(CP_UNIXCP
, 0, bufstr
, -1, bufstrW
, sizeof(bufstrW
) / sizeof(WCHAR
));
1512 if (main_name
&& !bufstrW
[0]) strcpyW(bufstrW
, main_name
);
1513 if (!cb(bufstrW
, (unsigned long)lm
.l_addr
, (unsigned long)lm
.l_ld
, FALSE
, user
)) break;
1517 #ifdef AT_SYSINFO_EHDR
1520 unsigned long ehdr_addr
;
1522 if (elf_search_auxv(pcs
, AT_SYSINFO_EHDR
, &ehdr_addr
))
1524 static const WCHAR vdsoW
[] = {'[','v','d','s','o',']','.','s','o',0};
1525 cb(vdsoW
, ehdr_addr
, 0, TRUE
, user
);
1532 /******************************************************************
1535 * Lookup in a running ELF process the loader, and sets its ELF link
1536 * address (for accessing the list of loaded .so libs) in pcs.
1537 * If flags is ELF_INFO_MODULE, the module for the loader is also
1538 * added as a module into pcs.
1540 static BOOL
elf_search_loader(struct process
* pcs
, struct elf_info
* elf_info
)
1542 return elf_search_and_load_file(pcs
, get_wine_loader_name(), 0, 0, elf_info
);
1545 /******************************************************************
1546 * elf_read_wine_loader_dbg_info
1548 * Try to find a decent wine executable which could have loaded the debuggee
1550 BOOL
elf_read_wine_loader_dbg_info(struct process
* pcs
)
1552 struct elf_info elf_info
;
1554 elf_info
.flags
= ELF_INFO_DEBUG_HEADER
| ELF_INFO_MODULE
;
1555 if (!elf_search_loader(pcs
, &elf_info
)) return FALSE
;
1556 elf_info
.module
->format_info
[DFI_ELF
]->u
.elf_info
->elf_loader
= 1;
1557 module_set_module(elf_info
.module
, S_WineLoaderW
);
1558 return (pcs
->dbg_hdr_addr
= elf_info
.dbg_hdr_addr
) != 0;
1561 struct elf_enum_user
1567 static BOOL
elf_enum_modules_translate(const WCHAR
* name
, unsigned long load_addr
,
1568 unsigned long dyn_addr
, BOOL is_system
, void* user
)
1570 struct elf_enum_user
* eeu
= user
;
1571 return eeu
->cb(name
, load_addr
, eeu
->user
);
1574 /******************************************************************
1577 * Enumerates the ELF loaded modules from a running target (hProc)
1578 * This function doesn't require that someone has called SymInitialize
1579 * on this very process.
1581 BOOL
elf_enum_modules(HANDLE hProc
, enum_modules_cb cb
, void* user
)
1584 struct elf_info elf_info
;
1586 struct elf_enum_user eeu
;
1588 memset(&pcs
, 0, sizeof(pcs
));
1590 elf_info
.flags
= ELF_INFO_DEBUG_HEADER
| ELF_INFO_NAME
;
1591 if (!elf_search_loader(&pcs
, &elf_info
)) return FALSE
;
1592 pcs
.dbg_hdr_addr
= elf_info
.dbg_hdr_addr
;
1595 ret
= elf_enum_modules_internal(&pcs
, elf_info
.module_name
, elf_enum_modules_translate
, &eeu
);
1596 HeapFree(GetProcessHeap(), 0, (char*)elf_info
.module_name
);
1602 struct process
* pcs
;
1603 struct elf_info elf_info
;
1608 /******************************************************************
1611 * Callback for elf_load_module, used to walk the list of loaded
1614 static BOOL
elf_load_cb(const WCHAR
* name
, unsigned long load_addr
,
1615 unsigned long dyn_addr
, BOOL is_system
, void* user
)
1617 struct elf_load
* el
= user
;
1621 if (is_system
) /* virtual ELF module, created by system. handle it from memory */
1623 struct module
* module
;
1624 struct elf_map_file_data emfd
;
1625 struct image_file_map fmap
;
1627 if ((module
= module_is_already_loaded(el
->pcs
, name
)))
1629 el
->elf_info
.module
= module
;
1630 el
->elf_info
.module
->format_info
[DFI_ELF
]->u
.elf_info
->elf_mark
= 1;
1631 return module
->module
.SymType
;
1634 emfd
.kind
= from_process
;
1635 emfd
.u
.process
.handle
= el
->pcs
->handle
;
1636 emfd
.u
.process
.load_addr
= (void*)load_addr
;
1638 if (elf_map_file(&emfd
, &fmap
))
1639 el
->ret
= elf_load_file_from_fmap(el
->pcs
, name
, &fmap
, load_addr
, 0, &el
->elf_info
);
1644 /* memcmp is needed for matches when bufstr contains also version information
1645 * el->name: libc.so, name: libc.so.6.0
1647 p
= strrchrW(name
, '/');
1651 if (!el
->name
|| !memcmp(p
, el
->name
, lstrlenW(el
->name
) * sizeof(WCHAR
)))
1653 el
->ret
= elf_search_and_load_file(el
->pcs
, name
, load_addr
, dyn_addr
, &el
->elf_info
);
1654 if (el
->name
) ret
= FALSE
;
1660 /******************************************************************
1663 * loads an ELF module and stores it in process' module list
1664 * Also, find module real name and load address from
1665 * the real loaded modules list in pcs address space
1667 struct module
* elf_load_module(struct process
* pcs
, const WCHAR
* name
, unsigned long addr
)
1671 TRACE("(%p %s %08lx)\n", pcs
, debugstr_w(name
), addr
);
1673 el
.elf_info
.flags
= ELF_INFO_MODULE
;
1676 if (pcs
->dbg_hdr_addr
) /* we're debugging a life target */
1679 /* do only the lookup from the filename, not the path (as we lookup module
1680 * name in the process' loaded module list)
1682 el
.name
= strrchrW(name
, '/');
1683 if (!el
.name
++) el
.name
= name
;
1686 if (!elf_enum_modules_internal(pcs
, NULL
, elf_load_cb
, &el
))
1692 el
.ret
= elf_search_and_load_file(pcs
, el
.name
, addr
, 0, &el
.elf_info
);
1694 if (!el
.ret
) return NULL
;
1695 assert(el
.elf_info
.module
);
1696 return el
.elf_info
.module
;
1699 /******************************************************************
1700 * elf_synchronize_module_list
1702 * this functions rescans the debuggee module's list and synchronizes it with
1703 * the one from 'pcs', ie:
1704 * - if a module is in debuggee and not in pcs, it's loaded into pcs
1705 * - if a module is in pcs and not in debuggee, it's unloaded from pcs
1707 BOOL
elf_synchronize_module_list(struct process
* pcs
)
1709 struct module
* module
;
1712 for (module
= pcs
->lmodules
; module
; module
= module
->next
)
1714 if (module
->type
== DMT_ELF
&& !module
->is_virtual
)
1715 module
->format_info
[DFI_ELF
]->u
.elf_info
->elf_mark
= 0;
1719 el
.elf_info
.flags
= ELF_INFO_MODULE
;
1721 el
.name
= NULL
; /* fetch all modules */
1723 if (!elf_enum_modules_internal(pcs
, NULL
, elf_load_cb
, &el
))
1726 module
= pcs
->lmodules
;
1729 if (module
->type
== DMT_ELF
&& !module
->is_virtual
)
1731 struct elf_module_info
* elf_info
= module
->format_info
[DFI_ELF
]->u
.elf_info
;
1733 if (!elf_info
->elf_mark
&& !elf_info
->elf_loader
)
1735 module_remove(pcs
, module
);
1736 /* restart all over */
1737 module
= pcs
->lmodules
;
1741 module
= module
->next
;
1746 #else /* !__ELF__ */
1748 BOOL
elf_find_section(struct image_file_map
* fmap
, const char* name
,
1749 unsigned sht
, struct image_section_map
* ism
)
1754 const char* elf_map_section(struct image_section_map
* ism
)
1759 void elf_unmap_section(struct image_section_map
* ism
)
1762 unsigned elf_get_map_size(const struct image_section_map
* ism
)
1767 DWORD_PTR
elf_get_map_rva(const struct image_section_map
* ism
)
1772 BOOL
elf_synchronize_module_list(struct process
* pcs
)
1777 BOOL
elf_fetch_file_info(const WCHAR
* name
, DWORD_PTR
* base
,
1778 DWORD
* size
, DWORD
* checksum
)
1783 BOOL
elf_read_wine_loader_dbg_info(struct process
* pcs
)
1788 BOOL
elf_enum_modules(HANDLE hProc
, enum_modules_cb cb
, void* user
)
1793 struct module
* elf_load_module(struct process
* pcs
, const WCHAR
* name
, unsigned long addr
)
1798 BOOL
elf_load_debug_info(struct module
* module
)
1803 int elf_is_in_thunk_area(unsigned long addr
,
1804 const struct elf_thunk_area
* thunks
)
1808 #endif /* __ELF__ */